Patch slot leaky-wave right-hand circular polarization antenna with additional spiral slots in the radiator

A new design of the patch slot leaky-wave antenna with circular polarization has been suggested. The peculiarity of the present antenna is in using additional slots in the front side metal of the antenna radiator, with their electrical length being shorter than the electrical length of the main slots of the radiator. The additional slots are implemented as spiral patches and located between the main spiral slots of the radiator. It is shown that the application of such additional slots allows microwave current lines to be more uniformly distributed along the main slots of the radiator, improving technical characteristics of the patch slot leaky-wave antennas with circular polarization.